Process for production of ornaments, lettering, or the like on artificial stone



Patented Mar. 23,1926.

UNITED STATES PATENT OFFICE.

PROCESS FOR PRODUCTION OF ORNAMENTS, LETTERING, OR THE LIKE ON ARTIFICIAL STONE.

No Drawing.

' 1 '0 all whom it may concern Be it known that I, ARNOLD 'NIELS PETER Jnoons, a subject of Denmark, residing at Copenhagen, Denmark, Humlebaekgade, have invented new and useful Improvements in a Process for Production of Ornaments, Lettering, or the like on Artificial Stone, of which the following is a specification.

The present invention is a process for transfer onto artificial stone of ornaments, lettering or other design in such a manner that this treatment will remain unaffected by light and water.

According to the invention, the process consists in giving either the mortar from which the finished casting is to be produced or the casting itself,an impregnation with an insoluble compound of some heavy metal, for instance, white lead, oxide of lead or red lead. (preferably oxide of lead, in proportion of 1% to 2%) and in giving then the finished casting, where the decoration-is to be applied, a surface coating of gum, dextrine or the like, and finally in transferring to the casting thus prepared the desired design by means of one or more corresponding rubber stamps or some other implement moistened with a watery or alkaline solution of sulphuretted hydrogen, whereby the sulphur compound of the metal used will. be precipitated in the surface of the article. The weak solution of gum is washed off after the cast has been imprinted by the rubber stamp, or other implement. If such a coating is not applied on the surface of Application filed February 21, 1924. Serial No. 694,439.

the casting, the ornaments, lettering or other design transferred onto the casting would not get clear and sharp lines.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. Process of ornamenting artificial stone consisting in impregnating the same with an insoluble compound of a heavy metal, coating with gum the surface which is to be ornamented, and simultaneously imprinting in said coated surface the ornamentation and moistening with a solution of sulphuretted hydrogen the surface so imprinted.

2. Process of ornamenting artificial stone consisting in impregnating the same with an insoluble lead salt, coating with gum the surface which is to be ornamented and simultaneously imprinting in said coated surface the ornamentation and moistening with a solution of sulphuretted hydrogen the surface so imprinted.

3. Process of ornamenting artificial stone consisting in impregnating the same with an insoluble compound of a heavy metal, coating with gum the surface which is to be ornamented, and simultaneously imprinting in said coated surface the ornamentation and moistening with an aqueous solution of sulphurette'd hydrogen the surface so imprinted.

In testimony whereof I have signed my name to this specification.

vARNOLD NIELS PETER JACOBS. 

